TW200643941A - Optical system, optical pickup apparatus, and optical disk apparatus - Google Patents

Optical system, optical pickup apparatus, and optical disk apparatus

Info

Publication number
TW200643941A
TW200643941A TW095107047A TW95107047A TW200643941A TW 200643941 A TW200643941 A TW 200643941A TW 095107047 A TW095107047 A TW 095107047A TW 95107047 A TW95107047 A TW 95107047A TW 200643941 A TW200643941 A TW 200643941A
Authority
TW
Taiwan
Prior art keywords
optical
light components
signal light
optical system
extracting
Prior art date
Application number
TW095107047A
Other languages
Chinese (zh)
Other versions
TWI328811B (en
Inventor
Tetsuya Ogata
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2005070366A external-priority patent/JP4859089B2/en
Priority claimed from JP2005103441A external-priority patent/JP4855703B2/en
Priority claimed from JP2005248548A external-priority patent/JP4859095B2/en
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Publication of TW200643941A publication Critical patent/TW200643941A/en
Application granted granted Critical
Publication of TWI328811B publication Critical patent/TWI328811B/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1395—Beam splitters or combiners
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1353—Diffractive elements, e.g. holograms or gratings
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1356—Double or multiple prisms, i.e. having two or more prisms in cooperation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
    • G11B7/1367—Stepped phase plates
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
    • G11B7/1369—Active plates, e.g. liquid crystal panels or electrostrictive elements
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
    • G11B2007/0009—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage
    • G11B2007/0013—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage for carriers having multiple discrete layers

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

The present invention discloses an optical system for extracting signal light components from a beam including the signal light components and stray light components. The optical system includes a condensing optical element situated on an optical path of the beam for condensing the beam, a polarization changing unit for changing the state of polarization of at least one of the signal light components and the stray light components included in the incident beam transmitted through the condensing optical element, and an extracting element for extracting the signal light components included in the beam transmitted through the polarization changing unit.
TW095107047A 2005-03-02 2006-03-02 Optical system, optical pickup apparatus, and optical disk apparatus TWI328811B (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2005056976 2005-03-02
JP2005070366A JP4859089B2 (en) 2005-03-14 2005-03-14 Extraction optical system, optical pickup device, and optical disc device
JP2005074031 2005-03-15
JP2005103441A JP4855703B2 (en) 2005-03-15 2005-03-31 Optical pickup, optical recording apparatus, optical reproducing apparatus, and optical recording / reproducing apparatus
JP2005135509 2005-05-09
JP2005248548A JP4859095B2 (en) 2005-03-02 2005-08-30 Extraction optical system, optical pickup device, and optical disc device

Publications (2)

Publication Number Publication Date
TW200643941A true TW200643941A (en) 2006-12-16
TWI328811B TWI328811B (en) 2010-08-11

Family

ID=36941352

Family Applications (1)

Application Number Title Priority Date Filing Date
TW095107047A TWI328811B (en) 2005-03-02 2006-03-02 Optical system, optical pickup apparatus, and optical disk apparatus

Country Status (5)

Country Link
US (2) US7660226B2 (en)
EP (1) EP1854098B1 (en)
KR (1) KR100803992B1 (en)
TW (1) TWI328811B (en)
WO (1) WO2006093326A1 (en)

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JP2007234087A (en) * 2006-02-27 2007-09-13 Toshiba Corp Optical pickup head device, and device and method for reproducing optical storage medium
WO2007114280A1 (en) * 2006-03-30 2007-10-11 Pioneer Corporation Optical pickup and information device
JP2007305254A (en) * 2006-05-12 2007-11-22 Sony Corp Optical pick up and optical disk unit
JP2008027507A (en) * 2006-07-20 2008-02-07 Sanyo Electric Co Ltd Optical pickup device
JP2008033991A (en) * 2006-07-26 2008-02-14 Konica Minolta Opto Inc Optical pickup device
TW200818170A (en) * 2006-07-26 2008-04-16 Konica Minolta Opto Inc Optical pickup apparatus
JP4842209B2 (en) 2006-08-22 2011-12-21 株式会社リコー Extraction optical system, optical pickup and optical disc apparatus
JP2008299980A (en) * 2007-06-01 2008-12-11 Hitachi Media Electoronics Co Ltd Optical pickup device and optical disk drive
CN101828226A (en) * 2007-10-18 2010-09-08 三菱电机株式会社 Extraction optical system and optical head device including same
JP5040028B2 (en) * 2007-12-05 2012-10-03 株式会社リコー Multilayer information recording medium / layer discrimination method
JP2009176378A (en) * 2008-01-28 2009-08-06 Hitachi Media Electoronics Co Ltd Optical head and device equipped with same
JP2009223937A (en) * 2008-03-14 2009-10-01 Ricoh Co Ltd Optical pickup and optical information processing device using the same
JP5070140B2 (en) * 2008-06-13 2012-11-07 株式会社日立メディアエレクトロニクス Optical pickup device
JP5281993B2 (en) * 2008-09-03 2013-09-04 株式会社リコー Reflective wave plate and optical pickup using the same
JP5103367B2 (en) * 2008-12-15 2012-12-19 株式会社日立メディアエレクトロニクス Optical pickup device and optical disk device using the same
JP2010192044A (en) * 2009-02-19 2010-09-02 Sanyo Electric Co Ltd Optical pickup device
JP5173899B2 (en) * 2009-03-12 2013-04-03 三洋電機株式会社 Optical pickup device
JP5542459B2 (en) * 2010-01-25 2014-07-09 株式会社日立メディアエレクトロニクス Optical pickup device and optical disk device using the same
JP2011181120A (en) * 2010-02-26 2011-09-15 Hitachi Maxell Ltd Collimating lens unit and optical pickup device using the same
JP2011181118A (en) * 2010-02-26 2011-09-15 Hitachi Media Electoronics Co Ltd Optical pickup device and optical disk apparatus
JP5277206B2 (en) 2010-06-07 2013-08-28 株式会社日立メディアエレクトロニクス Optical pickup device and optical disk device
JP5617561B2 (en) 2010-11-25 2014-11-05 株式会社リコー Imaging device
JP2012174290A (en) * 2011-02-17 2012-09-10 Hitachi Media Electoronics Co Ltd Optical pickup and optical disk unit
US9341855B2 (en) * 2012-05-08 2016-05-17 The Hong Kong University Of Science And Technology Polarization converter by patterned polarization grating
US9739448B2 (en) 2012-05-08 2017-08-22 The Hong Kong University Of Science And Technology Patterned polarization grating polarization converter
CN112750470B (en) 2019-10-30 2022-05-31 华为技术有限公司 Detection device, optical drive and detection method
DE102019129932B4 (en) * 2019-11-06 2023-12-21 Technische Universität Braunschweig Optical detection device and method for operating an optical detection device

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JP2624255B2 (en) 1987-06-09 1997-06-25 オリンパス光学工業株式会社 Optical recording / reproducing device
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US5615200A (en) * 1992-09-10 1997-03-25 Kabushiki Kaisha Toshiba Light beam shaping device to change an anisotropic beam to an isotropic beam for reducing the size of an optical head
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US6411587B1 (en) * 1999-10-08 2002-06-25 Konica Corporation Optical pickup optical system, optical pickup apparatus, coupling optical system, coupling optical system lens and recording/reproduction apparatus
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JP2002251768A (en) 2001-02-26 2002-09-06 Ricoh Co Ltd Optical path separating element and optical pickup device using it
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JP2002367211A (en) 2001-06-11 2002-12-20 Hitachi Ltd Optical information recording and reproducing device
KR100439372B1 (en) * 2001-09-13 2004-07-09 엘지전자 주식회사 Optical pickup
JP2003248960A (en) 2002-02-25 2003-09-05 Sony Corp Optical pickup and disk drive system
US20030214898A1 (en) 2002-04-15 2003-11-20 Tetsuya Ogata Optical pickup device and optical disk drive using the same
JP2003323736A (en) 2002-05-01 2003-11-14 Sony Corp Optical pickup, and optical recording and/or reproducing arrangement using the optical pickup
JP2004005810A (en) * 2002-05-31 2004-01-08 Fujitsu Ltd Optical disk device
DE60324859D1 (en) * 2002-06-14 2009-01-08 Samsung Electronics Co Ltd A method of arranging a scanning optical system and an optical recording and / or reproducing apparatus with an optical scanning system arranged according to this method
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JP4156911B2 (en) * 2002-12-02 2008-09-24 新オプトウエア株式会社 Optical information recording medium, optical information recording apparatus, and optical information reproducing apparatus
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US20050201248A1 (en) 2004-03-10 2005-09-15 Junichi Kitabayashi Optical pickup apparatus and an optical disc drive apparatus equipped with such an optical pickup

Also Published As

Publication number Publication date
EP1854098B1 (en) 2012-02-29
US7839753B2 (en) 2010-11-23
TWI328811B (en) 2010-08-11
KR100803992B1 (en) 2008-02-18
EP1854098A1 (en) 2007-11-14
KR20070065262A (en) 2007-06-22
EP1854098A4 (en) 2008-11-12
US20100091632A1 (en) 2010-04-15
US20080247298A1 (en) 2008-10-09
WO2006093326A1 (en) 2006-09-08
US7660226B2 (en) 2010-02-09

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Legal Events

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MM4A Annulment or lapse of patent due to non-payment of fees